Corrugated paper-board and process of making the same.



I e. w. SWIFT, 1R. CORRUGATED PAPER BOARD AND PRQCESS OF MAKING TH ESAM E.

APPLICATION HLED DECFZM 1914- FIG. [VT

Patented Sept. 26, 1916.

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I To all whom it may concern:

GEORGE W. SWIFT, 33., F BORDENTQWN, NEW JERSEY.

CORRUGATED PAPERFJBOABD AND PROCESS OF MAKING Specification of Letters Patent.

THE SAME.

Application filed December 24, 1914. Serial No. 878,891.

Be it known that I, GEORGE Jr., a citizen of the United States, residing at Bordentown, in the county of Burlington in the State of New Jersey, have invente acertain new and'useful Improvement in Corrugated Paper-Board and Processes .of

mg a corrugated either a single vention provides formed b silicate whlch is conveniently sprayed upon only reinforces Makingthe Same, whereof the following 1s a specification, reference being had to the accompanying drawing.

My invention may be advantageously employed in producing cellular fabric includpaper web'having a plane paper web attached upon one or both sides thereof. The corrugated web in such fabric, as ordinarily. constructed, consists of ply or a plurality of plies pasted together-throughout their extent and attached to said plane web or webs by adhesive only applied thereto at the crests of its corrugations; Such fabric offers but slight resistance to crushing strains and is easily permanently collapsed, and, it is the object of my invention to produce a similar fabric which, for a employed therein, pacity. for resistin given amount of paper shall have greater cacrushing strains, than said ordinary fabr c, so that such afabric of given strength in y be made at less cost than the ordinary fabric aforesaid. My insuch a cellular "fabric, wherein the corrugated web is reinforced, after it is corrugated, by a coating of p'ri marily. soluble nonfibrous material, which is more rigid but less costly than the paper of which said corrugated web is formed. As hereinafter described, such a coating is y an aqueous solution of sodium the corrugated weband not the latter upon its primarily plane face but serves as an adhesive for connecting the corrugated web with said plane web; which latter may ,be-likewiseremforced by such a coating.

My invention includes the various novel features of construction,arrangement and procedure hereinafter more definitely speci- In the drawing z-Figure I is a diagrammatic sectional view of mechanism whereby various fabrics embodying my invention Figs. II to VII inclusive show, the constituent elements of a double plane faced fabric wherein only the corrugated W. swIF'T,

' under control of opposite surface of said corrugated web.

Fig. VII shows 'a'second plane web attached to said fabric. Fig. VIII is a fragmentary edge view of a double plane faced fabric,- such as shown in Fig. VII, but both of its plane coatings.

In said figures, the primarily plane web 1, which is to form, the corrugated web, is directed between the inter-meshed corrugated rollers 2 and 3 and thus corrugated as'indicated at 4. Said corrugated web .4 is then reinforced with a coating of sodium silicate or other suitable material 5, conveniently sprayed thereon in aqueous solution, by means of the spraying device 6 under control of the valve 7. Before said coating has had time to dry upon said corrugated web 4 the'flatter is pressed into contact with the plane web 8 which is directed around the cylindrical roller 9, which may be spring pressed toward said corrugated roller 3 which is preferably heated by steam introduced axially at 11, so. as to dry the fabric during its passage around said roller 3, from which itis directed beneath the cylindrical roller 13 which may be similarlyheated bysteam introduced axially at 14. i The procedure above described produces the fabric shown in Fig. V, consisting of the corrugated web 4 reinforced by thecoating 5 upon one face thereof and connected with the single plane web 8, and such fabric may constitute a commercial product ofmy invention. However, the mechanism shown in Fig. I isadapted to produce a double cellular fabric embodying my invention by providing the underface of said *corrugated webs reinforced by such web 4 with the reinforcing coating 16 of sodium silicate, or other suitable material, conveniently sprayed thereon'in aqueoussolution by means of the spraying device 17 the valve 18. Before said coatin has had time to dry upon the lower face 0 said corrugated web 4, the latter is pressedinto contact with the plane web 20 which is directed around the roller 21 which is opposed by the roller- 22. Said-rollers 21 Patented Sept,, 26, 1916.

also having and 22 are preferably heated by steam introduced axially therein respectively at 23 and 24, to insure that the reinforcing coating shall be driedin adhesion to the plane convenient to include, in connection with the mechanism above described, means for providing the crests of the corrugations of said web fwith additional adhesive material, and therefore provide the pasting devices including the receptacles 27 which may be supplied with sodium silicate solution under control of the valves 28, or other suitable material which is picked up by the rollers 29 and distributed upon ,the, web 4 by the rollers 30. Said rollers 29 and 30 may also be heated by steam introduced axially thereto. Moreover,'said mechanism includes means for also providing the inner faces of said plane webs 8 and 20 with such coatings, including the spraying device 35 controlled by the valve 36v and the spraying device 38 controlled by the valve 39. By the employment of all of said spraying devices the cellular fabric shown in Fig. VIII is produced. Each of said spraying devices may conveniently include means for directing a blast of air in such relation to a passageway in communication with the liquid as to eject the latter intothe blast, by which it may be atomized and thus sprayed. However, the specific construction of the spraying devices is not of the essence of my present invention, and any suitable form of device may be employed. However, I prefer to provide devices of the blast type aforesaid, in which hot air is employed so that theatomized solution shall be thus warmed. I find it preferable to confine the spray from the spraying devices aforesaid by providing the latter with respective hoods 41 having walls extending transversely with respect to the webs, the full width of'the latter, and end walls overlapping the edges of the respective webs as indicated.

. Although I have shown the single tank 32 as the common source of supply of the ad hesive solution to the several devices above described, it is to be understood that they may be otherwise supplied.

I do not desire to lnmt myself to the spe cific details of construction, arrangement or procedure herein set forth as it is obvious that various modifications may be made therein without departing from my inven tion as defined in the appended claims.

.1 claim g V 1. A corrugated paper board including outer plane webs and an intermediate corrugated web; said corrugated web being reinforced throughout its entire surfaces opposed to said plane webs, by an adherent coating of sodium silicate.

2. A corrugated paper board including outer plane Webs and an intermediate cor rugated web; said corrugated web being reinforced throughout its entire surfaces opposed to said plane webs, by an adherent coating of inorganic material; said coating being continuous throughout the extent of said corrugated web.

3. A corrugated paper board including outer plane webs and an intermediate corrugated web; said corrugated web being reinforced throughout its entire surfaces opposed to said plane webs, by an adherent coating of soluble material; said coating being continuous throughout the extent of said corrugated web.

4. A corrugated paper board including outer plane webs and an intermediate corrugated web; said corrugated web being reinforced throughout its entire surfaces opposed to said plane webs, by an adherent coating of nonfibrous material; said coating being continuous throughout the extent of said corrugated web.

5. A corrugated paper board including an outer plane Web and a corrugated web; said corrugated web being reinforced upon both of its opposite surfaces by an adherent coating of sodium silicate.

6. A corrugated paper board including an outer plane web and a corrugated web; said corrugated web being reinforced upon its surface opposed to said plane web, by an adherent coating of sodium silicate.

7. A corrugated paper board including an outer plane web and a corrugated web; said corrugated web being reinforced upon both of its opposite surfaces by an adherent coating of inorganic material.

8. A corrugated paper board including an outer plane web and a corrugated web; said corrugated web being reinforced upon both of its opposite surfaces by an adherent coating of soluble material. 9. A corrugated paper board including an outer plane web and a corrugated web; said corrugated web being reinforced upon both of its opposite surfaces by an adherent coating of nonfibrous material.

10. A corrugated paper board including an outer plane web-and a corrugated web; said corrugated web be' reinforced upon its surface opposed to sai plane web, by an adherent coating of inorganic material.

11. A corrugated paper board including an outer plane web and a corrugated web;

said corrugated web being reinforced upon its surface opposed to sai plane web, by an adherent coating of nonfibrous material.

13. A corrugated paper web reinforced upon its surface by an adherent coating of sodium silicate extending between its crests and over the latter; more of said coating, bleing applied at the crests than between t em.

14. The process of making a corrugated paper board, which consists in corrugating a primarily plane ent coating upon one face thereof, by spraymg an aqueous solution of sodium silicate V thereon; attaching a plane web to the coated side of said corrugated web; forming an adherent coating upon the opposite face of said corrugated web by spraying an aqueous solution of sodium silicate thereon; and attaching a plane web to the last coated side of said corrugated web.

15. The process of making a corrugated paper board, which consists in corrugating a primarily plane web; forming ent coating upon one face thereof, ing I31, liquid thereon; attaching a o t e by sprayplane web coated side of said corrugated web;

web; forming. an adher- 7 ing coating by an adherforming an adherent coating upon the opposite side of saidcorrugated web by spraying a liquid thereon; and attaching a plane web to the last coated 'side of said corru-' gated web.

16. The process of making a corrugated paper board, which consists in corrugating a primarily plane web; forming an adherent coating upon one face thereof, by spraylng anaqueous solution of sodium silicate thereon; and attaching a plane web' to the coated side of said corrugated web.

17. The process of making a corrugated paper board, which consists in corrugating a. primarily plane web; forming an adherent coating u ing a liquid t ereon; and attaching a plane web to the coated side of said corrugated web.

18. The process of making corrugated paper board which consists in corrugating a primarily plane web, forming a reinforcspraying adhesive liquid thereon, applying an additional coating of liquid to the crests of the corrugations, and attaching a plane web thereto.

In testimony whereof, I have hereunto signed my name at Bordentown, ,New Jersey, this seventeenth day of December, 1914.

GEORGE W. SWIFT, JR. Witnesses:

WALTER ROBBINS,

R, B. HOLLO'WAY.'

on one face thereof, by spray 

